Feed-water heater for locomotives



June' 8 1926.

. P. THOMSEN FEED WATER HEATER FOR LOCOMOTIVES 2 Sheets-Sheet 1 Filed March 30, 1921- P. THOMSEN FEED WATER HEATER FOR LOCOMOTIVES June 8 6- Filed March 30, 1921 2 Sheets-Sheet 2 Patented June 8, 1926.

PATENT orFIcE.

PETER THOMSEN, OF C SSEL-WILI1TELIVISHOHE, GERMANY, ASSIGNOR, BY MESNLE AS- SIGNMENTS, TO THE SUPERHEATER COILIETPANY, (1F NEW YORK, N. Y., A COR- PORATION OE DELAWARE.

FEEDAVATER HEATER FOR LOCOMOTIVES.

Application filed March 30, 1921, Serial No. 457,142, and in Germany November 25, 1916.

The invention relates to feed-water heatore for locomotive boilers, and has for its object to improve the construction of such heaters in order to obtain the maximum degree of heating of the feed-water.

With this object in view, the invention consists in the details hereinafter described.

In the accompanying drawings, which illustrate one form of the invention,

Figure 1 shows a vertical longitudinal section through the fire-box of a locomotive,

Figure 2 being an end view, and

Figure 3 a plan partly in section.

According to the form of the invention shown, the feed-water heater tubes a, in staggered relation, are supported in vertical longitudinal walls of the box-likepockets or compartments, h, of the smoke-box, e, bends or caps, 2', in these compartments connecting the tubes in series. These caps, c, are accessible from the outside through open ings in the smoke-box wall provided with covers, so that on removing the caps, the inside surfaces of the tubes can be conveniently cleaned from. outside the smoke box. The outside surfaces of the tubes are also readily accessible and can thus be efiiciently cleaned when desired. The feed-water passes into the heater at 70, and is with drawn at Z, so that its direction of flow is opposite to that of the hot gases from the smoke tubes; in addition the heater is placed in the smoke-box at such a height that all boiler tubes Z), including even the uppermost, as well as the superheater elements, g, and their connections to the steam headers, 9 are accessible from the front.

Below the feed water heater a transverse partition is located in the smoke-box c, said partition being formed by two members 01 plates a, a hinged about vertical axes so that when swung forwardly they will be close to each other and afford a wide opening through which access may be had to the smoke tubes 6, the superheater tubes 9, the headers g and the parts associated therewith. The two members of plates a, ta are provided with cut-out portions at the top to receive individual plates or dampers u which normally hang down in a vertical position but may be swung upwardly and rearwardly about a horizontal axis located at their upper edges as indicated in Fig. 1 where such plates or dampers a are shown as connected with a shaft 0 carrying a hand lever. The purpose of these dampers a is to attain for a larger or smaller portion of the heating gases, when desired, a direct path to the stack cl, that is to say, bypassing the feed water heater so that, when starting up the boiler and for temporarily increased effort of the engine, the draft may be increased as required. The transverse partition formed by the members u, a, a subdivides the smoke-box 6 into two compartments 6 and e of which the forward one 6 contains the blast pipe m while the rear compartment receives the cinders and like matter. Thus there is provided for this matter a separate space from which it cannot be carried away by the action of the blast pipe. This compartment 6 furthermore acts as a throttling device for the intermittent or blow-like action of the blast pipe, thereby insuring a uniform carrying away of the furnace gases by suction from the the box through the heating tubes 6 and therefore a steady, uniform, combustion of the fuel, and thus a smaller consumption of coal.

Having described my invention, I claim:

1. A locomotive boiler plant comprising a boiler, smoke tubes extending through said boiler, a smoke-box into which said smoke tubes discharge, said smoke-box extending upwardly above the level of the uppermost smoke tubes, a feed water heater located in said smokebox above the level of the uppermost smoke tubes, an upright partition subdividing the smoke-box portion below the feed water heater into two compartments one communicating directly with the smoke tubes and the other with the outlet of the smoke box and a blast pipe located in that compartment which is distant from the smoke tubes.

2. A locomotive boiler plant comprising a boiler, smoke tubes extending through said boiler, a smoke-box into which said smoke tubes discharge, said smoke-box extending upwardly above the level of the uppermost smoke tubes, a feed water heater located in said smoke-box above the level of the upper-- most smoke tubes, a transverse partition subdividing the smoke-box portion below the feed water heater into two compartments, said partition being composed of hinged plates adapted to be opened, and a blast pipe located in the compartment distant from the smoke tubes.

3. A locomotive boiler plant comprising a boiler, smoke tubes extending through said boiler, a smoke-box into Which said smoke tubes discharge, said smoke-box extending upwardly above the level of the uppermost smoke tubes, a feed Water heater located in said smoke-box above the level of the upper- 10 most smoke tubes, a transverse partition subdividing the smoke-box portion below the feed Water heater into two compartments, said partition comprising hinged plates mounted to swing about upright axes and damper means located at the upper portion of said partition and swinging about a hori zontal axis, and a blast pipe located in the smoke-box compartment distant from the smoke tubes.

In testimony whereof I have hereunto set 20 

